* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


body {
    .gameContainer {
        width: 800px;
        height: 600px;
        outline: solid 1px;
        margin: 0 auto;
        position: relative;

        .clickLayer {
            position: absolute;
            display: block;
            width: 800px;
            height: 600px;
            left: 0;
            top: 0;
            background-color: rgba(255, 0, 0, 0.5);
        }

        .ground {
            position: absolute;
            display: block;
            margin: 0 auto;
            outline: solid 1px;
            left: 0;
            top: 0;
        }
    }

}